Portion of a spyglass



FIG. 1 is a front, side and top perspective view of a first embodiment of a portion of a spyglass, showing our new design;

FIG. 2 is a front view of the embodiment of FIG. 1;

FIG. 3 is a front, side and top perspective view of a second embodiment of a portion of a spyglass, showing our new design; and,

FIG. 4 is a front view of the embodiment of FIG. 3.

The features shown in broken lines depict environmental structure and form no part of the claimed design. 

CLAIM The ornamental design for a portion of a spyglass, as shown and described. 